Study of Micro-Organisms-2
1-Micro-organisms are to be found in air, soil, water, within thebodies of plants and animals.
2-Microbes are useful in home, industry, cleaning the environment.
3-Soil microbes degrade organic wastes into useful nutrients.This helps plans in their growth and development.
4-Some micro-organisms cause diseases in humans, plants and other animals.
5-Some insects and animals act as vectors of microbes.
6-Some microbes release toxins in improperly preserved food, which causes food poisoning.
7-Pasteurisation helps in milk preservation.
8-The bacterium rhizobium present in the root nodules of many leguminous plants fixes atmospheric nitrogen.
9-Some micro-organisms are very useful to our everyday life.e.g Curd making bacteria, in preparation of idly, dosa, bread and cake.
10-The process of converting sugar into alcohol is known as fermentation.
11-Antibiotics are produced by growing specific organisms.
12-Alexander Fleming discovered antibiotics.
13-Streptomycin, erythromycin are some of the examples of antibiotics.
14-Dr Jonas Salk discovered vaccine for Polio in 1952.
15-Vaccination was discovered by Edward Jenner.
15-The weakened disease causing micro-organisma which are injected into our bodies are called as vaccine.
16-Rhizobium present in the root nodules of many leguminous plants such as beans and peas.
17-Communicable diseases -The diseases which spread from one person to another (infected to healthy)are known as Communicable diseases.
18-Vectors -The disease carrying organisms are called vectors.
19-Pathogens -The disease causing organisms are called Pathogens
20-Symbiosis -The mutual beneficial relationship between organisms is called SYMBIOSIS.The participants organisms are called symbiosis.